Hobson, Montana has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 31.5 °F (low) to 56.3 °F (high). Annual precipitation averages 14.5 Inches. Hobson is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.7 °F | 36.2 °F | 0.53 in. |
| February | 15.4 °F | 37.0 °F | 0.48 in. |
| March | 21.9 °F | 45.2 °F | 0.78 in. |
| April | 29.5 °F | 53.4 °F | 1.32 in. |
| May | 38.0 °F | 62.4 °F | 2.32 in. |
| June | 45.6 °F | 70.6 °F | 2.68 in. |
| July | 51.3 °F | 81.5 °F | 1.54 in. |
| August | 50.3 °F | 81.2 °F | 1.44 in. |
| September | 41.9 °F | 70.4 °F | 1.29 in. |
| October | 31.8 °F | 56.9 °F | 0.95 in. |
| November | 22.4 °F | 44.3 °F | 0.61 in. |
| December | 15.7 °F | 36.5 °F | 0.51 in. |
| Annual | 31.5 °F | 56.3 °F | 14.45 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |